I have to agree with the previous posts. It could only help for you to interview several agents and find out how they can benefit you. As I often say, ask friends, family, colleagues for recommendations of agents/brokers they have worked with recently and been pleased with the results. There are also alot of great agents here on Trulia. You might also see if your employer has any relationships with brokerages. When you interview them ask about their experience, what their compensation is, types & terms of contracts they offer. There can be a good bit of details that need attention. See how you get along with them, what types of communication they use, if they can understand your needs & wants especially in regards to a certain property type. Ask them how they would recommend going about your purchase and how they can assist you. Take alot of notes.
Alot will be your level of comfort with them and will they be as responsive as you need/want. Google them, check out what others say about them, past clients, online reviews etc. Check them out with the Better Business Bureau, Massachusetts Office of Professional Licence etc.
Once you have this research you'll have a better idea if you could/should proceed on your own with the listing agent or use the services of a buyers agent. Some buyers are perfectly able to represent themselves in a home purchase, I would absolutely encourage the use of an attorney in this case. It's always best to do the research & make an informed decision. It can be an exciting and joyful time as well as trying and stressful. A buyers agent can be beneficial with their experience in dealing with the issues & situations that can develop.
I hope that helps, check back and let us know how you make out,